FAQ: What Type Of Mass Movement Was In Peruvian Andes 1970?

What happened in the 1970 earthquake in Peru?

On 31 May 1970, a huge earthquake struck off the coast of Peru. The quake and the massive landslides it triggered killed approximately 70,000 people. A wall of ice came loose from Peru’s highest mountain, Mount Huascarán, careered down the mountain at incredible speed and buried the town of Yungay.

What caused the 1970 Peru earthquake?

It had a moment magnitude of 7.9 and a maximum Mercalli intensity of VIII (Severe). The focal mechanism and hypocentral depth of the earthquake show that the earthquake was a result of normal faulting within the subducting slab.

Where did the huascarán avalanche happened?

On January 10, 1962, an avalanche on the slopes of an extinct volcano kills more than 4,000 people in Peru. Nine towns and seven smaller villages were destroyed. Mount Huascaran rises 22,000 feet above sea level in the Andes Mountains.

What caused the Huascaran avalanche?

On 31 May 1970, the most catastrophic rock-ice avalanche known in history was triggered at 3:23 p.m. by a strong earthquake with a magnitude of 7.7.

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What was the magnitude of the 1970 Peru earthquake?

At 3:23 p.m. local time, on May 31, 1970, an earthquake of magnitude 7 ¾; occurred approximately 15 miles off the coast of Peru, west of Chimbote.

What disasters happened in 1970?

Earthquake (7.7 magnitude), massive avalanche and floods (Peru) Date: May 31, 1970.

What are the most destructive tsunamis in history?

10 worst tsunamis in history

  • Sumatra, Indonesia – 26 December 2004.
  • North Pacific Coast, Japan – 11 March 2011.
  • Lisbon, Portugal – 1 November 1755.
  • Krakatau, Indonesia – 27 August 1883.
  • Enshunada Sea, Japan – 20 September 1498.
  • Nankaido, Japan – 28 October 1707.
  • Sanriku, Japan – 15 June 1896.
  • Northern Chile – 13 August 1868.

What is volcanic debris avalanche?

A debris avalanche rushes down the side of a volcano to the valley floor. Many such debris avalanches transform into lahars and travel tens of kilometers from the volcano. Typically, the scar created by the avalanche leaves a horseshoe shaped crater on volcano’s side.

What ultimately triggered a massive landslide in Peru in 1970 that killed 25000 people in the town of Yungay?

Ancash earthquake of 1970, also called Great Peruvian Earthquake, earthquake that originated off the coast of Peru on May 31, 1970, and caused massive landslides. Approximately 70,000 people died.

How can we prevent avalanches?


  1. Hiking after storm:
  2. Avoid steep slopes:
  3. Stay to the windward side of ridges: Stay on the windward side of gently sloping ridges.
  4. Avoid treeless slopes: Avoid treeless slopes and gullies.
  5. Watch for cracks: Watch for cracks or small slabs that have sheared off.
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What is the biggest avalanche in the world?

The deadliest single avalanche on record took place on 13 December 1916, near the Gran Poz summit of Monte Marmolada, Italy.

Is an avalanche only snow?

An avalanche is a rapid flow of snow down a hill or mountainside. Although avalanches can occur on any slope given the right conditions, certain times of the year and certain locations are naturally more dangerous than others. Wintertime, particularly from December to April, is when most avalanches tend to happen.

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